France (Fr 5th & 6th Armies, Br Exped Force, 343,000 men under Gen Joffre) attacked Germany (Ger 1st, 7th & 2nd Armies, 290,000 men under Gen Falkenhayn) in France. The CAA Database of Battles records 120 hours of fighting on a front of 112 km, a frontal attack against hasty defense and prepared defense, and that Germany held. Losses: France 50,000 (15%), Germany 30,000 (10%).
This plan is generated from those figures. It shows the shape of the battle the database describes: the size and width of the armies, the plan of attack and the outcome. It does not show where the units actually stood.